What happened to the fire in the nozzle of Ford Mondeo in 2004?

This situation may be caused by excessive carbon deposition in throttle, injector, intake valve, combustion chamber and intake pipe, or leakage of pipeline air source. These carbon deposits will block the idle channel, make the idle speed control device stuck or beyond its adjustment range, which will lead to low idle speed, unstable idle speed, oil collection, automobile failure and oil consumption. Also pay attention to check whether the pipeline in the carbon tank system is damaged. Gasoline vapor will be directly discharged into the atmosphere along the damaged part, which will cause air to enter the engine intake instead of fuel vapor, which will inevitably cause the engine mixture to be too lean, thus causing failure. I hope my answer is helpful to you.